Every time I boot it, all I get is a black screen with a movable mouse pointer. That's all. Any ideas?

Before this happened, I booted and got a blue screen that said that it couldn't boot and suggested I choose the option that would scan for errors. Afterwards, I got another screen that suggested I choose the option to restore from a previously saved position, which I choose. It was up and running for that session only.

I'm running an OEM Windows 7 professional version with all the updates applied.